Rotary hammer.



R. & F. HARNBR. ROTARY HAMMER.

APPLICATION FILED MAYI, 1911. v 1,049,083. Y Patent-,ea Dec. 31, 1912.

2 SHEETS-SHEET l.

agl.

R. & P. HARNER.

ROTARY HAMMER.

APPLICATION FILED Mum, 1911.

1,049,083. Patena Dec. 31, 1912.

v @ww @wwnmw Z755/ fa/772:62"

' @2M @im @HM/nul UNTEB STATES PATENT FFQE,

RAY HARNER LND EAY HARNER, OF COLBY, KANSAS.

ROTARY HAMMER.

To all whom it may concern.'

Be it known that we, RAY Hannes and lir linnen, citizens of the United States, iesiding at Colby, in the county of Thomas and State of Kansas, have invented new and useful Improvements in Rotary Hammers, of which the following is a specification.

n object of the invention is to provide a device for use in forging various metals upon an anvil.

To accomplish the desired result, use is made of a frame, connected circular platesv revolubly mounted on the frame and having hammers pivotally mounted therein, an anvil adjustably mounted on the frame and adapted to receive the blows of the mentioned hammers and means for connection with power transmitting mechanism adapted for operating the said hammers.

Reference is to be had to the accompanying drawings constituting a part of this specitication, in which similar characters of reference denote corresponding parts in all the views, and in whichl. `i, i.iie 1 is a vertical sectional view of our device. Fig. 2 is a partial side elevation of our device showing the driving mechanism. Fig. 3 is a fragmentary front elevation of our device, the anvil being removed therefrom. Fig. 4 is a perspective view of the anvil. Fig. 5 is a detail sectional view through one of the springs mounted between the circular plates and a lapted to act as bumpers for the hammers.

Referring more particularly to the views we provide a frame having a` cover 11 for removable engagement therewith and secured to the frame 10 is a spring catch 12 having a hooked end for engagement with `ne cover 11 to releasably secure the cover to the frame. .lournaled in suitable bearings 13 secured to the frame 10 is a shaft 14- having keyed thereto a plurality of spaced circular plates 15 provided with braces 16 disposed between the plates 15 and connected thereto, the said braces being equidistantly spaced apart. The braces 16 are each provided with transverselyT extending apertures in which are slidably mounted bumpers 17 consisting of pins 18 provided with heaes 19 and having springs 20 engaging the same to normally position the bumpers for a purpose that will be hereinafter more fully disclosed. Pivotally mounted on the plates 15 and between the same are arms 21 having trip hammers 22 integrally Specification of Letters Patent.

Application filed May 10, 1911.

Patented. Bec. 31,1912.

Serial No. 626,307.

formed on the outer ends thereof, the mentioned arms 21 being adapted to engage the bumpers 17 so that the said bumpers will tend to receive the shock occasioned by the hammers when the same rebound after striking a blow. Keyed to the shaft 1e on one of the ends thereof is a belt pulley 23 and journaled on the shaft 1st adjacent the pulley A3 is a belt tightener 24, consisting of a collar 25 encircling the shaft 14- and having an arm 26 extended therefrom, a. roller 2T being mounted on the outer end of the said arm and adapted to engage a belt 28 disposed over the belt pulley to tighten the belt relatively to the pulley 23 when the mentioned roller 2T is moved into tightening position. A second arm 29 is eX- tended from the collar 25 and pivotally connected to the outer end thereof is a rod 3G having the lower end thereof pivotally connected to a foot lever 31 mounted to swing on the frame 10 by means of a bearing and having the outer end 33 thereof ezatended exteriorly through a slot 34 in the frame 10 so that when the foot is placed on the outer end 33 and the foot lever is moved downwardly, the roller 27 will be moved to engage the belt 28, thus tending to frictionally tighten the same relatively to the pulley 23 as will be readily understood.

Formed on the fram-e 10 are a plurality of spaced flanges 35 and formed on the frame 10 between the flanges 35 are a series of horizontally extending notches 36. An anvil 37 is provided having a head 38 and a shank portion being provided with a series of notches 40 adapted to engage the notches 36, the mentioned anvil 37 being disposed between the flanges Bolts 41 are passed through the frame 10 and extend outwardly therefrom between the flanges 35, the said bolts being adapted to extend through slot-s 42 formed in the anvil 37 and the mentioned bolts having suitable nuts 43 threadedly engaging the outer ends thereof to retain the anvil 37 in position and the notches 36 in engagement with the notches 40.

Assuming that the belt 28 is connected to suitable driving mechanism to operate t-he belt and thus revolve the circular plates 15, it. will be readily understood that the hammers 22 will successively engage the head 38 of the anvil 37 and if a piece of metal is placed upon the mentioned anvil 37 the action of the hammers 22 relatively to the anvil will forge the metal in the usual manner.

null

lt will be understood that when the blow from the hammer is received upon the metal the hammer will rebound and the shock ot' the rebound is substantially absorbed by the bumpers 17.

lt may be desirable at times to change the position ot' the anvil 37 and in order to accomplish this result the nuts 48 are First loosened relatively to the bolts di, the anvil is pulled outwardly and disengaged trom the notches 3G and is then moved to the desii-ed position after which the nuts 43 are moved to rengagge the bolts il and rigidly position the anvil 37 relatively to the trame l()7 it being understood that the notches Ll0 ot' the anvil will reengage the notches 36 and tend to retain the anvil in locked position.

Having' thus fully described the invention, what we claim as new, is

l. ln a rotary hammer, the combination with a trame, ot spaced circular plates keyed to a shaft jonrnaled on t-he trame, braces interposed between the said plates to retain the same in spaced relation, headed pins slidably mounted on the said. braces and extendingV transversely therethrough, helical springs onv the said braces and encircling' the said pins to engage the heads thereof7 arms interposed between the circu- Loaaoes lar plates and having pivotal connection therewith, the said arms being` movable to engage the heads of the said pins with the free ends of the arms extending` beyond the peripheries of the said plates, hammers on the free ends ot' the arms, and an anvil adjustably mounted on the said frame and adapted to be engaged by the said hammers when the said plates are rotated.

2. In combination with a rotary hammer, f

comprising a frame having hammer members rotatably mounted thereon? spaced flanges formed on the said frame7 a series ot notches being 'formed in the frame between the said tianges 'an anvil having` a head and a shank and adapted for engagement with the said frame, a face of the said shank having notches therein for engagement with the notches in the said frame, bolts on the said trame and extending outwardly through slots in the said anvil7 and nuts tor threaded connection with the said bolts tor retaining the said anvil rigidly on the said trame,

ln testimony whereof we atliX our signatures in presence of two witnesses.

RAY HARNER. FAY l-Ifliltllllt. lli/'it-nesses:

Q. H. BRUNS, A. O. HnMs'r 1oai'.

@opties o this patent may be obtained tor ve cents each, by addressing the Commissioner of latents,

Washington, LD. C. 

